List of top Physics Questions asked in MHT CET

The critical angle for a ray of light from glass to air is \( \theta \) and refractive index of glass with respect to air is \(n\). If a ray of light is incident from air to glass at an angle \( \theta \), then corresponding angle of refraction is
A small quantity of paramagnetic liquid is taken in a watch-glass and kept on two dissimilar magnetic poles. The liquid
A particle is moving along a circular path of radius \(r\) with velocity \(v\). The magnitude of average acceleration after half revolution is
A particle executes linear S.H.M. with amplitude 4 cm. The magnitudes of velocity and acceleration are equal when it is 3 cm from the mean position. The time period of motion is
In an atom, two electrons complete three revolutions around the nucleus in circular orbit in time \(81t\) and \(192t\) respectively. The ratio of their radii will be (\(t\) is in second)
A planet has radius \( \dfrac{1}{4} \)th of the radius of earth and acceleration due to gravity double than that of the earth. Then the ratio of escape velocity on the surface of the planet to that on the earth’s surface will be
In Young’s double slit experiment, the angular width of a fringe is \(0.2^\circ\). If the entire apparatus is immersed in water of refractive index \(4/3\), the angular width of the fringe will be
A tuning fork of frequency 340 Hz is held vibrating at the open end of an empty measuring cylinder of length 100 cm. Water is then poured in slowly. What is the minimum height of water in the cylinder for which resonance will be obtained? (Given: Velocity of sound in air = 340 m/s, neglect end correction)
A bar magnet has pole strength of 15 A m and magnetic length 1 cm. What is the magnetic induction produced by it at a distance of 50 cm from either pole? (Given: \( \dfrac{\mu_0}{4\pi} = 10^{-7} \, \text{Wb A}^{-1}\text{m}^{-1} \))
A black sphere has radius \(R\) whose rate of radiation is \(E\) at temperature \(T\). If the radius is made \( \dfrac{R}{3} \) and the temperature is made \(3T\), the new rate of radiation will be
A spray pipe has a cylindrical tube of radius \(R\). It has \(n\) small holes of radius \(r\) at one end. The liquid flows through the tube with velocity \(V\). The velocity of the liquid through the holes is
An ammeter and a microammeter are converted from the same galvanometer. The resistance required for the conversion is
A galvanometer of resistance \(20\,\Omega\) has a current sensitivity of 5 div/mA. The instrument has 50 divisions. It can be converted into a voltmeter reading up to 25 V by connecting a resistance of
What is the energy stored per unit volume in vacuum, where the intensity of electric field is \(10^3 \, \text{V m}^{-1}\)?
(Given: \( \varepsilon_0 = 8.85 \times 10^{-12} \, \text{C}^2 \text{N}^{-1}\text{m}^{-2} \))
The work done in blowing a soap bubble of radius \(R\) is \(W_1\) at room temperature. Now, the soap solution is heated. From the heated solution another soap bubble of radius \(2R\) is blown and the work done is \(W_2\). Then
In the differential equation of linear simple harmonic motion \(\displaystyle \frac{d^2x}{dt^2} + \omega^2 x = 0\), the term \( \omega^2 \) represents
A force of 26 N is acting on a body of mass 2 kg in the x-y plane. The force is directed at an angle \(\cos^{-1}\left(\frac{12}{13}\right)\) with the x-axis. The component of acceleration along y-axis is
An electron of charge \(e\) is revolving in a fixed orbit of radius \(r\) with frequency \(f\). Its magnetic dipole moment is
The increase in length of a wire on stretching is \(0.05%\). If its Poisson’s ratio is 0.4, then its diameter is reduced by
If the ratio of amplitudes of two sound waves is \(4:3\), then the ratio of maximum and minimum intensities is
What is the percentage decrease in the weight of a body when it is taken to a height of 32 km from the surface of earth?
(Given: \( R = 6400 \, \text{km} \))
Which one of the following is a pair of isotones?

In Young's double slit experiment, for wavelength \( \lambda_1 \), the \( n^{\text{th}} \) bright fringe is obtained at a point \( P \) on the screen. Keeping the same setting, source of light is replaced by wavelength \( \lambda_2 \), and now \( (n+1)^th \) bright fringe is obtained at the same point \( P \) on the screen. The value of \( n \) is:

In a biprism experiment, red light of wavelength $6500\,\text{Å}$ was used. It was then replaced by green light of wavelength $5200\,\text{Å}$. The value of $n$ for which the $(n+1)^{\text{th}}$ green bright band would coincide with $n^{\text{th}}$ red bright band for the same setting is: 

The length of the seconds pendulum is 1 m on the earth. If the mass and diameter of the planet is half that of the earth then the length of the seconds pendulum on the planet will be: